Digital broadcasting system and terminal therefor

ABSTRACT

The terminal device is equipped with a location judgment database which stores setting data indicating the relationships between the location of the self device and the corresponding object to be presented to the user. On the basis of the location detection data obtained by detecting the location of the self device by receiving range signals transmitted by a plurality of GPS satellites and the setting data stored in the location judgment database, corresponding objects are selected from a plurality of objects received and decoded and they are synthesized and presented as they are output to the display or the speaker. Thus, an optimal object presentation can be achieved in accordance with the status of the terminal device.

TECHNICAL FIELD

The present invention relates to a digital broadcasting system forbroadcast multimedia data consisting of picture, sound, text and thelike, to a terminal device built in a mobile station, and to theterminal device.

BACKGROUND ART

Conventionally, in the field of television broadcasting, thedigitalization of ground-based broadcasting and satellite broadcastinghas been developed, and some of them are presently brought intopractice. However, these techniques are basically for the broadcastingto fixed terminal devices, and in the case where a terminal device isbuilt in a mobile station, it is considered to be difficult technicallyto provide an appropriate service which is in accordance with the stateof the use thereof. In particular, the contents of programs in thebroadcasting are all reproduced similarly by all terminal devices, andthus it is not possible to play selectively a part of the contents of aprogram upon the designation of a user, a broadcast station or a usecondition.

In the meantime, there is an increasing demand of a digital broadcastingsystem which broadcasts multimedia data containing picture, sound, textsand the like, to terminal devices built in, mainly, mobile stations.However, in order to satisfy such a demand, it is essential to solve theabove-described drawbacks that is technically difficult with aconventional television broadcasting system.

DISCLOSURE OF THE INVENTION

The present invention has been proposed by focusing on theabove-described circumstances, and the main object thereof is to providea digital broadcasting system which not only merely provides a programas a broadcast service when broadcast multimedia data containingpicture, sound, texts and the like, to a terminal device built in,mainly, a mobile station, but also is capable of presenting data whichcan flexibly follow up the needs and the use state of the user with theprogram contents themselves, as well as a terminal device therefor.

Particularly, the first object of the present invention is to provide adigital broadcasting system capable of presenting data optimal to thestatus of the terminal device, together with a terminal device.

Further, the second object of the present invention is to provide adigital broadcasting system for providing a broadcasting service from anew point of view, and capable of contributing to the development of theinformation society, by integrating a plurality of broadcasting servicestogether and further integrating a new service with a conventionalmedium.

In order to achieve the main object, according to the present invention,there is provided a digital broadcasting system which converts one ormore objects which constitute each scene of a presented program, into abroadcast signal at a broadcast station, to be broadcasted to apredetermined service area, and a terminal device for receiving thebroadcast signal, from which the objects are reproduced and synthesizedappropriately to reproduce the program.

With the above-described system structure, each scene of a program isconstituted by one or more objects to be transmitted as a signal, andtherefore it becomes possible to select the object as needed on thesignal receiving side, to be reproduced. Therefore, it becomes possibleto play a part of the contents of the program selectively upon thedesignation of the user, or the broadcast station side, and the useconditions, and thus as the contents of the program themselves, thepresentation of data can be carried out flexibly with the needs of theuser or the status of the use.

Here, in order to achieve the first object of the present invention,there is provided a terminal device used in a digital broadcastingsystem in which scene data having one or more objects is converted intoa broadcast signal in a broadcast station, and the broadcast signal istransmitted directly or in relay through a satellite, to broadcast it toa predetermined service area, including: status detection means fordetecting a predetermined status of the device itself; a database whichstores setting data which indicates a corresponding relationship betweenthe status of the device itself and the object presented to the user;and an object selection means. With the object selection means, anobject to be presented is selected from a plurality of objects received,on the basis of the detection result of the status detection means andthe setting data in the database, and thus selected object is presentedto the presenting device.

Specifically, the following three structures can be considered.

According to the first structure, location detection means for detectingthe present location of the device itself is provided for the statusdetection means, setting data which indicates a correspondingrelationship between the status of the device itself and the object tobe presented to the user is stored in a database. With the objectselection means, an object corresponding to the present location of theself device is selected from a plurality of objects received, on thebasis of the present location of the self device detected by thelocation detection means and the setting data in the database, and thusselected object is presented to the presenting device.

According to the second structure, moving state detection means fordetecting the moving state of the device itself is provided for thestatus detection means, setting data which indicates a correspondingrelationship between the moving state of the device itself and theobject to be presented to the user is stored in a database. With theobject selection means, an object corresponding to the moving state ofthe self device is selected from a plurality of objects received, on thebasis of the moving state of the self device detected by the movingstate detection means and the setting data in the database, and thusselected object is presented to the presenting device.

According to the third structure, presentation type detection means fordetecting the type of the presentation device is provided for the statusdetection means, setting data which indicates a correspondingrelationship between the type of the presentation device and the objectpresented to the user is stored in a database. With the object selectionmeans, an object corresponding to the type of the presentation device isselected from a plurality of objects received, the basis of the type ofthe presentation device detected by the presentation type detectionmeans and the setting data in the database, and thus selected object ispresented to the presenting device.

Therefore, in the terminal device according to the present invention, anoptimal object for a particular occasion can be selected and presentedin accordance with various situations of the terminal device, such asthe present location of the terminal device, the moving state of theterminal device and the type of the presentation device. Therefore, afurther effective object presentation is provided for the terminal user.

Meanwhile, according to the present invention, there is provided adigital broadcasting system and a terminal device used in the digitalbroadcasting system, in which scene description data used forsynthesizing a plurality of objects is converted into a broadcast signalin a broadcast station, and the signal broadcast signal is transmitteddirectly or in relay through a satellite, to broadcast it to a terminaldevice located within a predetermined service area on the ground,wherein: condition designation data transmission means for transmittingcondition designation data for designating the presentation condition ofan object, by containing it in the scene description data, is providedin the broadcast station, whereas status detection means for detecting apredetermined status of the device itself, and object selection meansare provided in the terminal device, and with the object selectionmeans, an object to be presented is selected from a plurality of objectsreceived, on the basis of the detection result of the status detectionmeans and the condition designation data contained in the scenedescription data received by the signal receiving means, and thusselected object is presented to the presenting device.

As the case described before, the following three structures can beconsidered.

According to the first structure, in condition designation datatransmitting means of a broadcast station, area designation data fordesignating a presentation area is added to each one of the objectswhich constitute a scene, to be transmitted, whereas in the terminaldevice, location detection means for detecting a present location of theself device is provided for status detection means, and in objectselection means, the present location of the self device detected by thelocation detection means and the area designation data contained in thescene description data received are compared with each other, and anobject corresponding to the present location of the self device isselected on the basis of the result of the comparison, and then ispresented on a presentation device.

According to the second structure, from the condition designation datatransmitting means of the broadcast station, moving state designationdata for presenting a data in accordance with the moving state of theterminal device for each one of the objects which constitute a scene, istransmitted, whereas in the terminal device, location detection meansfor detecting a present location of the self device is provided forstatus detection means, and in object selection means, the moving stateof the device detected by the moving state detection means and themoving state type designation data contained in the scene descriptiondata received are compared with each other, and an object correspondingto the moving state of the self device is selected on the basis of theresult of the comparison, and then is presented on a presentationdevice.

According to the third structure, from the condition designation datatransmitting means of the broadcast station, type designation data fordesignating a type of the presentation device capable of presenting adata for each one of the objects which constitute a scene, istransmitted, whereas in the terminal device, presentation type detectionmeans for detecting a type of the presentation device is provided forstatus detection means, and in object selection means, the type of thepresentation device detected by the presentation type detection meansand the type designation data contained in the scene description datareceived are compared with each other, and an object corresponding tothe designated presentation device is selected on the basis of theresult of the comparison, and then is presented on a presentationdevice.

Therefore, with the digital broadcast system and it terminal deviceaccording to the present invention, the most appropriate object isselected and presented in the terminal device in each time, inaccordance with the various status of the terminal device such as thepresent location of the terminal device, the moving state of theterminal device, and the type of the presentation device, as well as incompliance with conditions designated by the broadcast station side.Therefore, the presentation of an object can be more effective for theterminal user. Further, the condition of the presentation of an objectcan be arbitrarily designated by the broadcast station side.

In order to achieve the second object described above, according to thepresent invention, there is provided a digital broadcasting system forproviding broadcast services including at least one of picture, soundand data in each of a plurality of channels, wherein of broadcastsignals of the above-mentioned channels, broadcast services which arerelevant to each other can be provided for each other between arbitrarychannels, and a plurality of channels provided with broadcast servicesrelevant to each other are received and synthesized on the signalreceiving side, thus achieving the integration of a plurality ofbroadcast services.

Further, by providing data related to other communication or broadcastdata than that of the present digital broadcasting by the relevantbroadcast services described above, the integration with some othermedia can be achieved.

Further, the terminal device used for the digital broadcasting system,comprises: a broadcast signal receiver for receiving broadcast serviceswhich are relevant to each other, which can be provided for each otherbetween arbitrary channels, of broadcast signals of the above-mentionedchannels; data synthesizing means for synthesizing a plurality ofbroadcast services relevant to each other, which are received by thebroadcast signal receiver, thereby presenting thus synthesized servicesas one broadcast service; and a display and sound reproduction devicefor presenting a picture and sound of the broadcast service presented bythe means, thereby achieving to provide data in which a plurality ofbroadcast services are integrated.

Here, when data relevant to communication or broadcasting data otherthan that of the present digital broadcasting is provided in thebroadcast service, the communication and broadcasting data are obtainedon the basis of the relevant data, and are made presentable, thusachieving to provide data integrated with other media.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram showing the structure of a digitalsatellite broadcasting system according to the first to sixthembodiments of the present invention;

FIG. 2 is a circuit block diagram showing a structure of a signaltransmission station in the system shown in FIG. 1;

FIG. 3 is a circuit block diagram showing a structure of a terminaldevice according to the first embodiment of the present invention;

FIG. 4 is a flowchart showing a procedure and contents of datapresentation by the terminal device shown in FIG. 3;

FIG. 5 is a diagram showing an example of a structure of a locationjudgment database provided in the terminal device shown in FIG. 3;

FIG. 6 is a diagram showing an example of renewal data of the locationjudgment database;

FIG. 7 is a diagram showing a result of renewal of the location judgmentdatabase;

FIG. 8 is a circuit block diagram showing a structure of a terminaldevice according to the second embodiment of the present invention;

FIG. 9 is a flowchart showing a procedure and contents of datapresentation by the terminal device shown in FIG. 8;

FIG. 10 is a diagram showing an example of a structure of a runningstate judgment database provided in the terminal device shown in FIG. 8;

FIG. 11 is a diagram showing an example of a structure of a presentationtype judgment database provided in a terminal device according to thethird embodiment of the present invention;

FIG. 12 is a circuit block diagram showing a structure of the terminaldevice according to the third embodiment of the present invention;

FIG. 13 is a flowchart showing a procedure and contents of datapresentation by the terminal device shown in FIG. 12;

FIG. 14 is a circuit block diagram showing a structure of a terminaldevice according to the fourth embodiment of the present invention;

FIG. 15 is a flowchart showing a procedure and contents of datapresentation by the terminal device shown in FIG. 14;

FIG. 16 is a diagram showing an example of a structure of scenedescription data having an area designation function, used in the fourthembodiment of the present invention;

FIG. 17 is a diagram showing an example of a structure of scenedescription data having a running state designation function, used inthe fifth embodiment of the present invention;

FIG. 18 is a circuit block diagram showing a structure of a terminaldevice according to the fifth embodiment of the present invention;

FIG. 19 is a flowchart showing a procedure and contents of datapresentation by the terminal device shown in FIG. 18;

FIG. 20 is a circuit block diagram showing a structure of a terminaldevice according to the sixth embodiment of the present invention;

FIG. 21 is a flowchart showing a procedure and contents of datapresentation by the terminal device shown in FIG. 20;

FIG. 22 is a diagram showing an example of a structure of scenedescription data having a running state designation function, used inthe sixth embodiment of the present invention;

FIG. 23 is a schematic diagram showing the structure of a digitalsatellite broadcasting system according to the seventh embodiment of thepresent invention;

FIG. 24 is a block diagram showing a structure of a terminal device usedin the seventh embodiment of the present invention, when it is mountedin a mobile station;

FIGS. 25A and 25B each are an explanatory diagram illustrating how toprovide map data in the seventh embodiment of the present invention;

FIG. 26 is a diagram showing a type and contents of data at eachdivisional area number in the map data shown in FIG. 25;

FIG. 27 is a flowchart illustrating the processing contents of an areaselection section in the seventh embodiment of the present invention;

FIG. 28 is an explanatory diagram illustrating a data acquiring area ofthe map data shown in FIG. 25;

FIG. 29 is a diagram showing a type and contents of a servicecorresponding to each service data number of local data services in theseventh embodiment of the present invention;

FIG. 30 is a flowchart illustrating the processing contents of a servicearea selection section within the area in the seventh embodiment of thepresent invention;

FIG. 31 is a flowchart illustrating the processing contents of thesynthesizing portion in the seventh embodiment of the present invention;

FIGS. 32A, 32B and 32C are diagrams illustrating display examples of theintegration of related broadcast services, integration with ITS data,and integration with ground wave TV broadcasting, respectively, in theseventh embodiment of the present invention; and

FIG. 33 is a diagram specifically illustrating the integration with theITS data in the seventh embodiment of the present invention.

BEST MODE OF CARRYING OUT THE INVENTION

Embodiments of the present invention will now be described in detailwith reference to accompanying drawings.

First, a brief description of the digital broadcast system used in theembodiments will be first provided.

The system uses a broadcast satellite or communication satellite, and isdesigned mainly for a mobile station. As a coding method, MPEG4 (movingpicture coding experts group 4) is employed, and an S-band is used for adownlink from a satellite to a terminal device. Thus, in a mobileterminal device such as a car-equipped terminal device or mobile dataterminal device, multimedia data containing picture, sound, texts andthe like, can be received.

In this system, as described before, the use of MPEG4 is assumed. TheMPEG4 is designed to express a scene by synthesizing hierarchicalvisual/acoustic signals made of a plurality of AVOs (audio/visualobjects: structural elements represented such as person and background),as compared to the conventional motion picture coding mode, by which,basically, an image is simply encoded as a scene. Each hierarchicalstructural element may be a natural picture/sound or a synthesizedimage/sound. It may show an entire scene or a part of a scene. Further,a high degree of freedom can be obtained in the overlapping ofstructural elements or the temporal/spatial relationship.

That is, in the present system which uses the MPEG4, a plurality ofobjects which constitute one scene and scene synthesizing data forsynthesizing these objects are encoded in an elementary stream each atan optimal algorithm, and then after a while, they are multiplexed to betransmitted. On the receiving side, each of the received objects andscene description data received is encoded, and then the objects aresynthesized in accordance with the contents of the scene descriptiondata, and output to presentation devices such as a display and speaker.

With the above-described system structure, each of the scenes of programcontents is constituted by one or more objects, and therefore it becomespossible to select an object in accordance with necessity on thereceiving side, to be played. With this structure, a part of the programcontents can be selectively played on the basis of the designation ofthe user, designation of the broadcast station side and the usageconditions. Therefore, it becomes possible to provide data presentationwhich flexibly meets with the needs of the user and the use state bymeans of the program contents themselves.

Meanwhile, when objects are synthesized and presented on the basis of,only the scene description data, there is a possibility that aninappropriate presentation depending upon the status of the terminaldevice. For example, in the case where an object has data regarding aregion, if the object is displayed at all times, an object which isregardless of the present location of the terminal device is displayedon itself. Further, in the case of a terminal device which is carried ina car, when display data such as an image or text data is displayed onthe display while driving, the driver cannot concentrate on driving asbeing distracted by the display, and therefore it is not preferable interms of traffic safety.

On the other hand, in connection with the new broadcast system describedabove, it is recommended that a nationwide broadcast and a regionalbroadcast can be arbitrarily selected by the structure that each of aplurality of broadcast stations can independently specify a broadcastservice area. Here, in the terminal device mounted in a mobile station,if broadcast services which are required along with the motion can bereceived at the same time, a significant effect is brought out for theuser. Further, if it is possible to integrate with conventional mediasuch as ground-wave broadcast (television broadcast, radio broadcast),or communication means through public communication network, a newliving environment can be provided for the users, thus contributing tothe development of the information society.

The digital broadcast system entailing the above-described problem willnow be described with reference to embodiments.

(First Embodiment)

The first embodiment of the present invention has a structure that aterminal device includes a location judgment database which storessetting data indicating the relationship between the location of theself device and an object to be presented to the user. The location ofthe self device is detected by receiving range signals transmitted froma plurality of GPS (global positioning system) satellites, and on thebasis of thus detected location data and the setting data stored in thelocation judgment database, objects corresponding to the presentlocation of the self device are selected out of a plurality of objectsreceived and decoded, and thus selected objects are synthesized ordisplayed or output from a speaker.

FIG. 1 is a schematic structural view of a digital satellite broadcastsystem according to the present invention. The digital satellitebroadcast system includes at least one transmitting station 10, asatellite control station 20 and geostationary satellite 30.

The transmitting station 10 receives program data formed and edited by aplurality of program providers, and channel-multiplexing the programdata to be then converted into a broadcast signal, which is transmittedto the geostationary satellite 30 via, for example, an ascendingtransmitting path of the Ku band (12.5 to 18 GHz). As the channelmultiplexing system, for example, a CDM (code division multiplex) systemis used.

The geostationary satellite 30 includes a Ku-band antenna 31 having adiameter of, for example, 2.5 m-class, and an S-band antenna 32 (forexample, 2.6 GHz) having a diameter of, for example, 15 m-class. Thebroadcast signal transmitted from the transmitting station 10 isreceived by the Ku-band antenna 31, and then converted by a transponderinto an S-band signal. Thus converted broadcast signal is transmittedfrom the S-band antenna 32 towards a service area via a descendingtransmitting path of the S-band. The diameter of the ascendingtransmitting antenna 31 equipped in the geostationary satellite 31 maybe smaller than that of a 2.5 m class, and the diameter of the S-bandantenna 32 is not limited to 15-m class but may be of a 8-m class.

It should be noted that the satellite control station 20 monitors theoperation state of the geostationary satellite 30 to control it.

In the service area, a broadcast signal receiving device (not shown),for example, fixedly installed in an office or home, or a movableterminal device 40 of a type which is carried in an automobile or of aportable type, can receive a broadcast signal transmitted to thedescending transmitting path of the S-band from the geostationarysatellite 30. In the descending transmitting path of the S-band, aplurality of channels (for example, 30 channels) having a transmittingcapacitance of 256 kbps are multiplexed. Here, the MPEG4 is used as themethod of encoding transmitting data.

It should be noted that the transmitting station 10 and the terminaldevice 40 are constitute by the following structures, respectively. FIG.2 is a circuit block diagram showing the structure of the transmittingstation 10 and FIG. 3 is a block diagram showing the structure of theterminal device 40.

First, the transmitting station 10 comprises an authoring device 11. Theauthoring device 11 creates scene data in compliance with the MPEG4 byselectively using audio data AU1 to AUn, visual data MP1 to MPn and textdata TX1 to TXn, supplied from program providers. The scene dataincludes a plurality of objects, namely, the above-mentioned audio data,visual data and text data, as well as scene description data used forsynthesizing these objects.

The audio data, visual data, text data and scene description data,output from the authoring device 11 are respectively input to an audioobject encoding unit 12, a visual object encoding unit 13, a text objectencoding unit 14 and a scene description encoding unit 15. In theseencoding units 12 to 15, the audio data, visual data, text data andscene description data are encoded into elementary streams respectivelyeach by an optimal algorithm which corresponds to the characteristics ofthe respective data. Subsequently, thus encoded elementary streams aremultiplexed by a multiplexing unit 16 in compliance with a predeterminedformat, into a multiplex stream. Then, the multiplex stream isdigital-modulated by the transmitting unit 17, and further convertedinto a Ku-band broadcast signal, then it is transmitted from thetransmitting antenna 18 towards the geostationary satellite 30.

Next, the terminal device 40 receives an S-band broadcast signaltransmitted from the geostationary satellite 30 via a signal receivingantenna 41, and the signal is input to a signal receiving unit 42. Inthe signal receiving unit 42, frequency conversion and digital decodingare carried out on the broadcast signal, and thus decoded multiplexstream is a multiplex separation unit 43. The multiplex separation unit43 separates the multiplex stream into a plurality of elementarystreams, and these elementary streams are input to an audio objectdecoding unit 44, a visual object decoding unit 45, a text objectdecoding unit 46 and a scene description decoding unit 47.

The audio object decoding unit 44, the visual object decoding unit 45,the text object decoding unit 46 and the scene description decoding unit47 decode the above-mentioned element streams respectively, so as toplay an audio object, visual object, text object and scene object, andthus decoded audio object, visual object and text object are input to asynthesizing unit 50A via a selecting unit 49.

The scene description data decoded by the scene description decodingunit 47 is input to a scene description analyzing unit 48. The scenedescription analyzing unit 48 analyzes the scene description data, andthus analyzed data SC is given to the selecting unit 49, thus passingobjects necessary to synthesize the scene. The scene descriptionanalyzing unit 48 gives the scene description analyzed data SC also tothe synthesizing unit 50A.

In the meantime, the terminal device 40 includes a GPS signal receivingunit 62, and ranging signals transmitted from GPS satellites GS1, GS2, .. . , are the present location is stored, the objects corresponding thisregion are selected from a plurality of received objects input from theselecting unit 49. The selected objects are synthesized in accordancewith the scene description analysis data SC, and then supplied to adisplay 53 or a speaker 54, or both of them.

In the case where DB renewal data is sent by using scene descriptiondata from the transmitting station 10, a DB renewal control means 52Acarry out a process of renewing corresponding data within the locationjudgment database 55A in accordance with the contents of the renewaldata analyzed by the scene description analyzing unit 48. The renewalprocess includes revision and deletion of a region already registeredand an object corresponding thereto, and addition of a region which hasnot yet been registered and an object corresponding thereto.

The object presentation operation carried out by the terminal devicehaving the above-described structure will now be described. FIG. 4 is aflowchart indicating its controlling procedure and the control contents.

During an operation of receiving a broadcast signal, the synthesizingunit 50A takes in location detection data LD from the location detectingunit 63 periodically by Step 4 b. Then, each time new location detectiondata LD is taken in, the new data is compared received by the GPS signalreceiving unit 62 through an antenna 61. Then, the received signal isinput to a location detecting unit 63. The location detecting unit 63obtains a coordinate location of the self device on the basis of theranging signals which came from the GPS satellites GS1, GS2, . . . , anda location detection data LD is input to the above-describedsynthesizing unit 50A.

Further, the terminal data has a location judgment database (locationjudgment DB) 55A. In the location judgment database 55A, type data ofobjects to be presented are stored to be associated with regions withina service area. FIG. 5 shows an example thereof, in which objects aremanaged as categorized into default data and setting data. Of these, thedefault data is data already written at the time of shipment of theterminal device 40. The setting data can be set arbitrarily by anoperator of the terminal by operating a key input unit which is notshown.

The synthesizing unit 50A has presentation control means 51A anddatabase renewal controlling means 52A as new functions according to thepresent invention.

The presentation control means 51A compares the location detection dataLD given from the location detecting unit 63, that is, the presentlocation of the terminal device 40, with regions stored in the locationjudgment database 55A. When a region which includes with the locationdetection data LD taken in at one previous time in Step 4 b, and fromthe comparison result, it is judged if the self device has moved for apredetermined amount or more. When it has moved for a predeterminedamount or more, the operation moves onto Step 4 c, where the locationjudgment database 5 is searched to judge whether or not the regionincluding the present location of the self device is registered.

If the result of the judgment indicates that the region including thepresent location of the self device is registered in the locationjudgment database 5, the operation of the synthesizing unit 50A movesonto Step 4 e, where setting objects corresponding to theabove-described corresponding region are read out so as to judge whetheror not objects are stored. When a setting object is stored, the objectsare selected from a plurality of received objects input from theselecting unit 49, and thus selected objects are synthesized inaccordance with the scene description analysis data SC, to be suppliedto the display 53 or the speaker, or both of these.

For example, when the present location of the self device is a region“Tokyo”, a setting object “Tokyo1:Image 1” is read out as shown in FIG.5, and objects corresponding to the setting object are selected from aplurality of objects received. Thus selected objects are synthesized inaccordance with the scene description analysis data SC, and thensupplied to the display 53 to be displayed.

On the contrary, when the setting object is not registered, theoperation moves onto Step 4 g, where it is judged whether or not defaultdata of object corresponding to the location judgment database 55A areregistered. If registered, the default data are synthesized inaccordance with the scene description analysis data SC in Step 4 h, tobe supplied to the display 53 or the speaker, or both of these. Or ifthe default data are not registered, other default data are read fromthe location judgment database 55A, and supplied to the display 53 orthe speaker, or both of these.

As described above, in the terminal device 40, an object correspondingto the region which includes the present location of the device isselected to follow to the movement thereof, and displayed on the display53 or output from the speaker 54. With this operation, the terminal userbecomes able to obtain data corresponding to the region where the useris present, at all times. Further, the contents of the location judgmentdatabase 55A can be revised arbitrarily, that is, data may be added ordeleted, by key operation carried out on the terminal device, andtherefore the terminal user becomes able to freely designate a region toeach object in accordance with the desire of the user.

Meanwhile, let us suppose that database renewal data which uses scenedescription data comes from the transmitting station 10 during anoperation. In this case, the synthesizing unit 50A carries out a renewaloperation of the location judgment database 55A in accordance with thereceived database renewal data.

For example, let us suppose that the database renewal data as shown inFIG. 6 is received when the location judgment database 55A is structuredas shown in FIG. 5. In this case, in the location judgment database 55A,the revision of the setting object corresponding to region “Tokyo”, theaddition of a region “Kawasaki” and its object, and the deletion of aregion “Yokohama” are carried out. FIG. 7 shows a version of thelocation judgment database after the renewal.

With the above-described structure, it becomes possible to renew thecontents of the location judgment database 55A of each terminal device40 from the transmitting station 10 side in reply to, for example, theaddition or deletion of a new region or the revision of a program, orthe like.

It should be noted that as the means for detecting the location of theterminal device 40 itself, a type which detects its location bydetecting a base station ID transmitted from a PHS (personal handy phonesystem) base station, or the like can be utilized, other than thatutilizes a GPS satellite.

Further, region data corresponding to the present location of theterminal device may be displayed on the display 53 on the basis oflocation detection data LD obtained by a location detecting unit 63 andthe region data registered in the location judgment database 55A, orwhen the region is switched along with the movement of the terminaldevice, message data indicating such may be displayed on the display 53.Further, in this case, the message data may be output from the speaker54 as a voice message.

(Second Embodiment)

According to the second embodiment of the present invention, on aterminal device carried in an automobile, a running state judgmentdatabase which stores setting data indicating the correspondingrelationship between the running state of the self device and the objectto be presented, is provided. The running state of the self device isdetected on the basis of the speed data or the like of the automobile,and appropriate objects are selected from a plurality of objectsreceived and decoded, on the basis of the running state detection dataand the setting data stored in the running state judgment database, andsynthesized to be output to the display or speaker.

FIG. 8 is a block diagram showing the structure of a terminal devicecarried in an automobile, according to the second embodiment. It shouldbe noted that structural elements shown in this figure, which aresimilar to those shown in FIG. 3 are designated by the same referencenumerals, and detailed descriptions therefor will be omitted here.

In the terminal device of this embodiment, a running state judgmentdatabase 55B is provided. In the running state judgment database 55B,identification data (object ID) of objects to be presented are stored asthey are associated respectively with the running states of the selfdevice, that is, it is running or standing still. FIG. 10 shows anexample thereof, in which objects are managed as they are divided intodefault data and filtering data. Of these, the default data are dataalready written at the time of shipment of the terminal device 40. Thefiltering data can be arbitrarily set by the operation of a key inputunit which is not shown, carried out by the terminal user.

The terminal device of this embodiment is equipped with a running statedetection unit 56. The running state detecting unit 56 serves to judgeif the self device is running or standing on the basis of a speeddetection signal output from a speed detector of the automobile, andthen supplies the result of the judgment to the synthesizing unit 50B asrunning state detection data RD.

The synthesizing unit 50B includes a presentation control means 51B. Thepresentation control means 51B accesses the running state judgmentdatabase 55B using the running state detection data RD as a key, outputfrom the running state detection unit 56, and read out object type datacorresponding to the detected running state. Then, from a plurality ofreceived objects input from the selecting unit 49, those which match theobject type are selected, and the selected objects are synthesized inaccordance with the scene description analysis data SC, and thensupplied to the display 53 or the speaker 54, or both of them.

With the above-described structure, the following object presentationoperation is carried out in the terminal device according to thisembodiment. FIG. 9 is a flowchart indicating the control procedure andcontents thereof.

While receiving a broadcast signal, the synthesizing unit 50B takes inrunning state detection data RD from the running state detecting unit 56periodically in Step 9 a. Then, each time the running state detectiondata RD is taken in, it is judged in Step 9 b, whether or not thedetection data RD has varied as compared to one previously takendetection data. When it is detected that the running state has variedfrom “running” to “standing”, or “standing” to “running”, the operationmoves on to Step 9 c, where the present running state is judged to beeither one of them.

When the result of the judgment indicates that the present running stateis “running”, the synthesizing unit 50 moves onto Step 9 d, wherefiltered objects are read out from the running state judgment database55B, and are judged whether or not they are designated to filtering. Ifthey are designated to filtering, in Step 9 h, those which correspond tothe objects designated to filtering are selected from a plurality ofreceived objects input from the selecting unit 49, and the selectedobjects are synthesized in accordance with the scene descriptionanalysis data SC, and then supplied to the display 53 or the speaker 54,or both of them.

Or if not designated to filtering, in Step 9 g, the default data areread out, and those objects corresponding to the default data areselected from a plurality of received objects input from the inputtingsection 49, and the selected objects are synthesized in accordance withthe scene description analysis data SC, and then supplied to the display53 or the speaker 54, or both of them.

In the meantime, let us suppose now that the running state of the selfdevice is in “standing”. In this case, the synthesizing unit 50 movesfrom Step 9 c onto Step 9 i, where filtered objects are read out fromthe running state judgment database 55B, and are judged whether or notthey are designated to filtering. If they are designated to filtering,in Step 9 l, those which correspond to the objects designated tofiltering are selected from a plurality of received objects input fromthe selecting unit 49, and the selected objects are synthesized inaccordance with the scene description analysis data SC, and thensupplied to the display 53 or the speaker 54, or both of them.

Or if not designated to filtering, in Step 9 k, the default data areread out, and those objects corresponding to the default data areselected from a plurality of received objects input from the inputtingsection 49, and the selected objects are synthesized in accordance withthe scene description analysis data SC, and then supplied to the display53 or the speaker 54, or both of them.

For example, if the running state of the self device is in “running”,audio objects are selected from a plurality of received objects in thesynthesizing unit 50B since “voice” is stored in the database 55B asobjects designated to filtering, and the selected objects aresynthesized in accordance with the scene description analysis data SC,and then output loud from the speaker 54.

Therefor, during running, of the scene data, only the audio objects areoutput from the speaker 54, images or texts are not at all displayed onthe display 53. Therefore, the user does not take a look at the display53 during running, thus making it possible to drive safely.

Meanwhile, during standing, visual objects and text objects aredisplayed on the display 53, and the audio object is output from thespeaker 54. Therefore, if the automobile is stopped, the user is able tosee and hear the scene data which includes all the objects.

It should be noted that the selection of an object during running isfixed only to the audio object, persons sitting in the passenger's seator back seat can no longer see images or texts during running. Thus, asthe user carries out a mode switching operation using the key inputportion, image objects and text objects may be displayed on the display53 during running as an alternative.

Further, during running, it is possible that text objects are convertedinto audio objects by a sound synthesizing technique, to output it fromthe speaker 54. With this structure, text objects such as headline news,traffic information, and weather forecast can be informed to theterminal user by reading them in voice, and thus the terminal userbecomes able to know the contents of the text objects during running.

In the case where music and audio objects of a personality are alreadypresent when the audio objects generated by the voice synthesis areoutput from the speaker 54, these sound objects already present shouldbe decreased in sound volume and then synthesized, to be finally outputas sound. Further, in the case of a stereo-compatible speaker system,the audio object generated by the voice synthesis is output from onechannel (for example, the right channel on the driver's seat side), andthe already present audio object is output from the other channel (theleft channel on the passenger's seat), to carry out channel separation.Further, when outputting the objects, the sound volume of the rightchannel should be made relatively larger than the volume of the leftchannel. With this structure, the terminal user becomes able to hear thevoice synthesis object corresponding to the text more clearly.

(Third Embodiment)

According to the third embodiment of the present invention, the terminaldevice is provided with a presentation type judgment database whichstores setting data indicating the corresponding relationship betweenthe type of a presentation device being engaged and used, and objects tobe presented. Before the receiving of a broadcast signal, type of theterminal device being used by connection is identified, and on the basisof the result of the judgment of the type and the setting data stored inthe presentation type judgment database, appropriate objects areselected from a plurality of objects received and decoded, andsynthesized, so as to be output to a display or speaker, serving as apresentation device.

FIG. 12 is a block diagram showing the structure of a terminal deviceaccording to the third embodiment. It should be noted that structuralelements shown in this figure, which are similar to those shown in FIG.3 are designated by the same reference numerals, and detaileddescriptions therefor will be omitted here.

In the terminal device of this embodiment, a presentation type judgmentdatabase 55C is provided. In the presentation type judgment database55C, identification data (object ID) of objects to be presented arestored as they are associated respectively with the type of the selfdevice being used by connection, that is, the speaker, a low-resolutiondisplay or high-resolution display. FIG. 11 shows an example thereof.

The synthesizing unit 50C comprises presentation control means 51C andpresentation type judgment means 52C. The presentation type judgmentmeans 52C judges the type of a presentation device being connected tothe synthesizing unit 50C, that is, if the display 53 is connected orthe speaker 54 is connected is judged, and further it the display isconnected, it is judged if its specification is at high resolution orlow resolution.

The presentation control means 51C accesses the presentation typejudgment database 55C using the judgment result of the presentation typejudgment database 55C as a key, and presentable objects are recognized,in order to present received objects. Then, from a plurality of receivedobjects input from the selecting unit 49, those which match thepresentable object are selected, and the selected objects aresynthesized in accordance with the scene description analysis data SC,and then supplied to the display 53 or the speaker 54, or both of them.

With the above-described structure, the following object presentationoperation is carried out in the terminal device according to thisembodiment. FIG. 13 is a flowchart indicating the control procedure andcontents thereof.

Prior to the reception of a broadcast signal, the synthesizing unit 50Cjudges the type of the terminal device which is connected to be madeusable in Step 13 a. If the result of the judgment indicates that thepresentation type is a speaker 54, then the operation moves onto Step 13b, a corresponding object, that is, “voice” is read out from thepresentation type judgment database 55C. Further, in Step 13 c, onlyaudio objects are selected from a plurality of receiving objects inputfrom the selecting unit 49, and when there are a plurality of selectedaudio objects, these are synthesized in accordance with the scenedescription analysis data SC, and then supplied to the speaker 54, tooutput sound.

On the other hand, if the presentation type is the low-resolutiondisplay, the operation moves onto Step 13 d, where a correspondingobject, that is, “text” is read out from the presentation type judgmentdatabase 55C. Further, in Step 13 e, the text object is selected from aplurality of received objects input from the selecting unit 49. Whenthere is a plurality of text objects selected, these are synthesized inaccordance with the scene description analysis data SC, and thensupplied to the low-resolution display 53 to display it.

It should noted that when the speaker 54 is connected as a presentationdevice, the operation moves onto Step 13 d, where the synthesizing unit50C selects the audio object from a plurality of received objects inputfrom the selecting unit 49. When these audio objects selected, aresynthesized in accordance with the scene description analysis data SC,and then supplied to the speaker 54 to output sound.

Further, when the presentation type is a high-resolution display 53, theoperation moves onto Step 13 f, where corresponding objects, that is,“image” and “text” are read out from the presentation type judgmentdatabase 55C. Further, in Step 13 g, the visual object and text objectare selected from a plurality of received objects input from theselecting unit 49, and thus selected visual objects and text objects aresynthesized in accordance with the scene description analysis data SC,and then supplied to the low-resolution display 53 to display it.

It should noted that when the speaker 54 is connected as a presentationdevice, the synthesizing unit 50C selects the audio object from aplurality of received objects input from the selecting unit 49, andthese audio objects selected are synthesized in accordance with thescene description analysis data SC, and then supplied to the speaker 54to output sound.

According to the third embodiment, an object which is compliance withthe type of the presentation device being used by connection isautomatically selected and to be presented by the presentation device,and thus an appropriate object presentation in accordance with the typeof the presentation device can be performed at all times.

It is possible that the judgment result of the presentation typejudgment means 52C is displayed on the display 53. With this operation,in the case where the low-resolution mode is set although the display 53has a high-resolution mode, for example, the terminal user is able torevise the setting to the high-resolution mode after the present mode ismonitored.

(Fourth Embodiment)

According to the fourth embodiment of the present invention, in thetransmitting station, scene description data are transmitted with regiondesignation data added thereto, which is to designate the region ofpresentation of each object. In the terminal device, ranging signalstransmitted by a plurality of GPS satellites are received to detect thelocation of the self device, and on the basis of the location detectiondata and the region designation data contained in the scene descriptiondata, objects corresponding to the present location of the self deviceare selected from a plurality of objects received and decoded. Further,thus selected objects are synthesized, so as to be output to a displayor speaker.

FIG. 14 is a block diagram showing the structure of a terminal deviceaccording to the fourth embodiment. It should be noted that structuralelements shown in this figure, which are similar to those shown in FIG.3 are designated by the same reference numerals, and detaileddescriptions therefor will be omitted here.

The terminal device includes a GPS signal receiving unit 62, by whichranging signals transmitted by GPS satellites GS1, GS2, are receivedthrough antenna 61. Further, the received signals are input to thelocation detecting unit 63. The location detecting unit 63 obtains acoordinate location of the self device on the basis of the rangingsignals transmitted from the GPS satellites GS1, GS2, . . . , and inputsit location detection data LD to the synthesizing unit 50D.

The synthesizing unit 50D comprises presentation control means 51D. Thepresentation control means 51D compares location detection data LD givenfrom the location detecting unit 63, that is, data indicating thepresent location of the terminal device 40, with region designation datacontained in the scene description analysis data given from the scenedescription analysis unit 48. Then, objects which has been subjected tothe region designation corresponding to the present location areselected from a plurality of received objects input from the selectingunit 49, and thus selected objects are synthesized in accordance withthe scene description analysis data SC, to be supplied to the display 53or the speaker, or both of these.

The object presentation operation carried out by the terminal devicehaving the above-described structure will now be described. FIG. 15 is aflowchart indicating its controlling procedure and the control contents.

During an operation of receiving a broadcast signal, the synthesizingunit 50D takes in location detection data LD from the location detectingunit 63 periodically by Step 15 a. Then, each time new locationdetection data LD is taken in, the new data is compared with thelocation detection data LD taken in at one previous time in Step 15 b,and from the comparison result, it is judged if the self device hasmoved for a predetermined amount or more. When it has moved for apredetermined amount or more, the operation moves onto Step 15 c, whereone received object is selected out of the scene description analysisdata SC, and the region designation data added to be associated with thereceived object is compared with the present location of the self devicein Step 15 d. If the result of the judgment indicates that the presentlocation of the self device located in the designated region, theoperation moves onto Step 15 e, where corresponding objects are selectedfrom a plurality of received objects output from the selecting unit 49,as objects to be presented.

On the other hand, if the present location of the self device is judgedto be not in the designated region in Step 15 d, then the operation ofthe synthesizing unit 50 moves onto Step 15 f, where it is judgedwhether or not not-yet-selected objects are remaining in the scenedescription analysis data SC. If remaining, the operation goes back toStep 15 c, the not-yet-selected object is selected, and the process fromthe steps 15 d to 15 e is executed. Then, similarly, the above-describedprocess is repeatedly carried out on every object included in the scenedescription analysis data SC. After that the objects selected in theabove processing operations, as object to be presented are synthesizedin accordance with the scene description analysis data SC, and they aresupplied to the display 53 or the speaker, or both of these to presentthe objects.

Therefore, with this operation, only the objects which have beensubjected to the designation of the region corresponding to the presentlocation of the self device are selected out of a plurality of objectsreceived and presented on the presentation device. For example, let ussuppose now that scene description data as shown in FIG. 16 are sentfrom the signal transmitting station, and the present location of theself device is included in the designated region “Tokyo”. In this case,in the synthesizing unit 50D, those objects which are designated as“TOKYO” by the region designation data, that is, “voice 1”, “text 1” and“image 1” are selected, and these objects are synthesized in accordancewith the scene description analysis data SC, and then displayed on thedisplay 53 and output from the speaker 54, as sound.

With the above-described structure, in the terminal device 40, an objectof a region which is not related to the present location of the selfdevice will not be presented, and it becomes possible for the terminaluser to obtain data corresponding to the present location of the self atall time. Further, in the embodiment, the designation of the region ofeach object is carried out on the signal transmitting station 10 side,and the revision of the designated regions, which becomes necessary tomatch the renewal of the object can be carried out in a batch on thesignal transmitting station 10 side.

(Fifth Embodiment)

According to the fifth embodiment of the present invention, in thetransmitting station, scene description data are transmitted whileadding running state designation data thereto for each object, which isto designate whether or not it is to be presented in accordance with therunning state of the terminal device. In the terminal device, therunning state of the self device is detected on the basis of speed dataand the like of the automobile, and on the basis of the running statedetection data and the running state designation data included in thescene description data, appropriate objects are selected from aplurality of objects received and decoded. Further, thus selectedobjects are synthesized, so as to be output to a display or speaker.

FIG. 18 is a block diagram showing the structure of a terminal device tobe carried in a car, according to the fifth embodiment. It should benoted that structural elements shown in this figure, which are similarto those shown in FIG. 8 are designated by the same reference numerals,and detailed descriptions therefor will be omitted here.

The terminal device of this embodiment includes a running statedetection unit 56, as in the case of the device shown in FIG. 8. Therunning state detecting unit 56 judges if the self device is running orstanding on the basis of the speed detection signal output from thespeed detector of the automobile, and supplies the result of judgment toa synthesizing unit 50E as running state detection data RD.

The synthesizing unit 50E comprises presentation control means 51E. Thepresentation control means 51E compares running state detection data RDgiven from the running state detecting unit 56, that is, data indicatingif the terminal device 40 is in running or standing, with running statedesignation data contained in the scene description analysis data givenfrom the scene description analysis unit 48. Then, objects correspondingto the present running state of the self device are selected from aplurality of received objects input from the selecting unit 49, and thusselected objects are synthesized in accordance with the scenedescription analysis data SC, to be supplied to the display 53 or thespeaker 54, or both of these.

The object presentation operation carried out by the terminal devicehaving the above-described structure will now be described. FIG. 19 is aflowchart indicating its controlling procedure and the control contents.

During an operation of receiving a broadcast signal, the synthesizingunit 50E takes in running state detection data RD from the running statedetecting unit 56 periodically by Step 19 a. Then, each time new runningstate detection data RD is taken in, it is judged if the running stateof the self device is in “running” or “standing” on the basis of thedetection data RD in Step 19 b.

If the result of the judgment indicates that the self device is in“running state”, the operation moves onto Step 19 c, where one object isselected from the scene description data, and the running statedesignation data added to be associated with this object and the presentrunning state of the self device are compared with each other in Step 19d. If the result of the comparison indicates that the running statedesignation data is “presentation is on while running”, then theoperation moves onto Step 19 e, where corresponding object are selectedas an object to be presented, out of a plurality of received objects,output from the selecting unit 49.

On the other hand, if the running state designation data is“presentation is off while running”, then the operation moves onto Step19 f, where it is judged whether or not not-yet-selected objects areremaining in the scene description analysis data SC. If remaining, theoperation goes back to Step 19 c, one not-yet-selected object isselected, and the process from the steps 19 d and 19 e is executed.Then, similarly, the above-described process is repeatedly carried outon every object included in the scene description analysis data SC.

After that the objects selected in the above processing operations, asobject to be presented are synthesized in accordance with the scenedescription analysis data SC, and they are supplied to the display 53 orthe speaker, or both of these to present the objects.

Therefore, with this operation, only the objects which have beendesignated as “presentation while running permitted” are selected out ofa plurality of objects received and presented on the presentationdevice. For example, let us suppose now that scene description data asshown in FIG. 17 are sent from the signal transmitting station. Then, inthe synthesizing unit 50E, the object designated as “presentation whilerunning permitted” by the running state designation data, that is, only“voice 1”, are selected, and the audio object is output from the speaker54, in accordance with the scene description analysis data SC, as sound.

With the above-described structure, in the terminal device 40, only theaudio object is output as sound while the self device is running, andthe image object or text object is not displayed. Therefore, it sets theterminal user free from having to monitor the display 53 while driving,and therefore safety drive can be achieved.

It should be noted if, in Step 19 b, the running state of the selfdevice is judged to be “standing”, then the operation of thesynthesizing 50E moves onto Step 19 g, where all the objects receivedare selected, and the objects are synthesized in accordance with thescene description analysis data SC, to be supplied to the display 53 orthe speaker, or both of these to present the objects. Therefore, as theterminal user stops the automobile, the scene data which contains allthe objects can be seen and heard.

As described above, according to the fifth embodiment, the objects canbe appropriately presented in accordance with the running state of theself device. Further, in the embodiment, the designation of thepresentation which is in accordance with the running state of eachobject is carried out on the signal transmitting station 10 side, andthe revision of the designated regions, which becomes necessary to matchthe renewal of the object can be carried out in a batch on the signaltransmitting station 10 side.

(Sixth Embodiment)

According to the sixth embodiment of the present invention, in thetransmitting station, scene description data are transmitted whileadding presentation device type data thereto for each object, which isto indicate the type of the presentation device to be used. In theterminal device, before the reception of the broadcast signal, the typeof the terminal device being used by connection is identified, and onthe basis of the result of the judgment of the type and the presentationtype judgment data contained in the scene description data received,objects corresponding to type of the presentation device which is beingconnected to be used, are selected from a plurality of objects receivedand decoded, and these objects are synthesized in accordance with thescene description data, so as to be output to a display or speaker,serving as a presentation device.

FIG. 20 is a block diagram showing the structure of a terminal device tobe carried in car, according to the sixth embodiment. It should be notedthat structural elements shown in this figure, which are similar tothose shown in FIG. 1 are designated by the same reference numerals, anddetailed descriptions therefor will be omitted here.

A synthesizing unit 50F comprises presentation control means 51F andpresentation type judgment means 52F. The presentation type judgmentmeans 52F judges the type of a presentation device being connected tothe synthesizing unit 50F, that is, if a display 53 is connected or aspeaker 54 is connected is judged, and further it the display 53 isconnected, it is judged if its specification is at high resolution orlow resolution.

When presenting received objects. The presentation control means 51Fcompares the judgment result of the presentation type judgment meanswith the presentation device type data contained in the scenedescription analysis data SC obtained by the scene description analysisunit 48. Then, on the basis of the result of the comparison, objects incompliance with the type of the presentation device presently connectedto the self device, are judged, and from a plurality of received objectsinput from the selecting unit 49, those which match the object areselected, and the selected objects are synthesized in accordance withthe scene description analysis data SC, and then supplied to the display53 or the speaker 54.

With the above-described structure, the following object presentationoperation is carried out in the terminal device according to thisembodiment. FIG. 21 is a flowchart indicating the control procedure andcontents thereof.

Prior to the reception of a broadcast signal, the synthesizing unit 5OFjudges the type of the terminal device which is connected to be madeusable. That is, if the display 53 is connected or the speaker 54 isconnected is judged, and further if the display 53 is connected, it isjudged if the specification is a high resolution or low resolution.

When a broadcast signal is received in the above-described state, thesynthesizing unit 50F, in Step 21 a, selects one object from the scenedescription analysis data SC output from the scene description analysisunit 48, and the type of the presentation device associated with thisobject is compared with the type of the presentation device of the selfalready judged in advance in Step 21 b. If they match, thosecorresponding to the selected object are selected from a plurality ofreceived objects output from the selecting unit 49 in Step 21 c.

On the other hand, if the result of the comparison indicates that thetype of the presentation device designated by the scene description datafrom the signal transmitting station 10 side, and the type of thepresentation device connected to the self device do not match, theoperation of the synthesizing unit 50F moves onto Step 21 d, where it isjudged whether or not not-yet-selected objects are remaining in thescene description analysis data SC. If remaining, the operation goesback to Step 21 c, one not-yet-selected object is selected, and theprocess from the steps 21 b and 21 c is executed. Then, similarly, theabove-described process is repeatedly carried out on every objectincluded in the scene description analysis data SC.

After that, the objects selected in the above processing operations, asobject to be presented are synthesized in accordance with the scenedescription analysis data SC, and they are supplied to the presentationdevice connected to the self device, to present the objects.

Let us suppose now that scene description data as shown in FIG. 22 issent from the signal transmitting station 10 while the speaker 54 andthe low-resolution display 54 are connected to the self device. In thiscase, the synthesizing unit 50F recognizes objects designated to typessuch as “speaker” and “low-resolution LCD”, that is, “voice 1” and “text1” by the presentation device type data. Further, out of a plurality ofreceived objects output from the selecting unit 49, those receivedobjects which correspond to the above-mentioned “voice 1” and “text 1”are selected respectively, and these received objects are synthesized inaccordance with the scene description analysis data SC, and thensupplied to the display 53 or the speaker 54.

Meanwhile, in the case where the speaker 54 and the high-resolutiondisplay are connected to the self device, out of a plurality of receivedobjects output from the selecting unit 49, those received objects whichcorrespond to the above-mentioned “voice 1”, “text 1” and “image 1”,that is, all the objects, are selected, and these received objects aresynthesized in accordance with the scene description analysis data SC,and then supplied to the display 53 and the speaker 54.

It should be noted that in the case of a terminal device of a radio typehaving only a speaker, out of a plurality of received objects outputfrom the selecting unit 49, the received object which corresponds to the“voice 1”, that is, only the audio object, is selected, and output fromspeaker 53 as sound.

According to the sixth embodiment, objects which are in compliance withtypes of the presentation devices being used by connection are selectedon the basis of the presentation device type data contained in the scenepresentation data, and presented by the respective presentation devices.Therefore, an appropriate object presentation in accordance with thetype of the presentation device can be performed at all times. Moreover,the designation of the type of the presentation device corresponding toa respective object is carried out on the signal transmitting station 10side, and the revision of the designation of the type of thepresentation device, which becomes necessary to match the renewal of theobject can be carried out in a batch on the signal transmitting station10 side.

(Seventh Embodiment)

FIG. 23 is a schematic diagram showing a structure of a digitalsatellite broadcast system to which the seventh embodiment of thepresent invention is applied. It should be noted that structuralelements shown in this figure, which are similar to those shown in FIG.23 are designated by the same reference numerals, and descriptionstherefor will not be repeated here.

In FIG. 23, an automobile equipped with a terminal device 40 comprises aGPS signal receiver for receiving GPS signals from GPS satellites (GS1,GS2) to obtain the present location of the self, a ground wave TVreceiver for receiving a ground wave television broadcast from a groundwave television broadcast station 100, an ITS receiver for receiving ITSdata from an ITS (Intelligent Transportation System), and a mobilecommunication device for carrying out communication by connecting to aresponse server 310 via a mobile public network 300.

FIG. 24 shows a structure of the car-equipped terminal device 40. InFIG. 24, a satellite broadcast wave from a geostationary satellite 30 isreceived via an antenna 141 by a satellite broadcast receiving unit 142.The receiving unit 141 is capable of selecting at least two channels ofbroadcast services, one of which is sent to a first selection channeldata processing unit 43, and the other is sent to a second selectionchannel data processing unit 144. The data processing units 143 and 144are designed to decode the data of the selected broadcast servicesrespectively, and the data obtained here are sent via an area selectingunit 145 and an area service data selecting unit 146, respectively, to asynthesizing unit 147, where they are integrated into one service data.Of the service data obtained here, image data is displayed on a displayunit 148 and voice data is played acoustically by an audio playback unit149.

A touch panel sensor (not shown) is provided on the display screen ofthe display unit 148, and a touch panel selection control unit 150 forinstructing a data presentation to the synthesizing unit 147 from asensor output by judging the designation data of the user is provided.When the designation data indicates the connection with the responseserver 310, the touch panel selection control unit 150 informs its userdesignation data to a mobile communication control device 151. Duringthis period, the mobile communication control device 151 obtains addressdata of a communication opponent (response server 310) from the areaservice data selecting unit 146, and controls the mobile communicationdevice 158 to make a connection with the response server 310. Thus,necessary data is downloaded or uploaded.

On the other hand, to the area selecting unit 145, the present locationdata obtained by the GPS receiver 153 via an antenna 152 is input.Further, to the area service data selecting unit 146, ITS data obtainedby an ITS receiver 155 via an antenna 154, and program data of groundwave TV broadcast obtained by a ground wave TV receiver 157 via anantenna 156 are input. It should be noted that the ITS data and groundwave TV program data are, in some cases, input to the synthesizing unit147.

In connection with the car-equipped signal receiving terminal device 40having the above-described structure, integration of a plurality ofbroadcast services will now be described.

Let us suppose now that a broadcast service of map information isprovided on one channel, whereas a local broadcast service of facilitiesand region is provided on another channel.

Here, in the broadcast service of map information, the map within theservice area is divided like a mesh as shown in FIG. 25A (it may becircular zones), and the divided areas are referred to by area numbers(1 to N), so as to present it in a bitmap format as shown in FIG. 25. Inthe case, the range (region) of each divided area is designated by theupper left coordinates and the lower right coordinates, which areexpressed by a north latitude and east longitude. FIG. 26 shows thetypes and contents of data at the respective divided area numbers (areaNo.) of the map information data. When a broadcast service whichprovides the map information is selected, it is decoded in the firstchannel data processing unit 143 and sent to the area selecting unit145.

The processing contents of the area selecting unit 143 are shown in FIG.27. First, from the map information, the north latitude and eastlongitude data of the lower right and upper left coordinates of each ofthe areas No.1 to N are obtained so as to specify the region of eacharea (S1). Then, GPS location data (present location) are obtained atcertain intervals from the GPS receiver 153 (S2).

Next, an area No.1 is designated (S3), and it is judged if the presentlocation is included in the area No.1 (S4). If not included, thesubsequently area No. is designated to judge if the present location isincluded, and after that, until the area which contains the presentlocation is found, the operation is repeated (S5 to S8). When the areawhich includes the present location is found, it is monitored if thepresent location falls out of the area (S9). If it falls out of thearea, an area which presently includes the present location is searched(S10), and the operation moves on to the process of Step S4.

While the present location is included in the area, the area and thebitmap (map) of other 8 areas which surround that area are obtained andrenewed (S11), and the bitmaps of the above 9 areas are developed on aninternal image memory (S12). Thus, the bitmap data of the display regionwith respect to the present location being set at center is output(S13). Here, the reason why the bitmaps of not only the area whichincludes the present location but also the surrounding areas areobtained and renewed, is to be able to follow to the next display areaimmediately after the present location falls out of the display areabetween times t1 and t2 as the device-equipped automobile moves as shownin FIG. 28. Please note that an area No. i is directly displayed inorder to simplify the explanation.

On the other hand, in the case where the location data and itsadditional data are, of movie theaters, convenience stores, gasstations, financial facilities, governmental facilities are provided ina hierarchical way, the data of the local broadcast service is decodedby the second channel data processing unit 144, and then sent to theintra-service data selecting unit 146.

Here, as local broadcast services, a number (No.) is assigned to each ofthe service data as shown in FIG. 29, and service type, location, title,address of response service, and additional data are prepared as typesof service in accordance with necessity. For example, the contents ofservice No. 1 include a service type of movie theater, a location ofnorth latitude oo degrees and east longitude xx degrees, a title ofcinema 1, a server address of xx-xxxx-xxxx, and additional data of stillimage and voice, and the contents of service No. 2 include a servicetype of convenience store, a location of north latitude oo degrees andeast longitude xx degrees, a title of A store 1, a server address ofxx-xxxx-xxxx, and additional data of text data. Here, the number ofservice data is set to be M.

The process contents of the area service data selecting unit 146 areshown in FIG. 3. First, the region data of an area No. i which includesthe present location is obtained from the area selecting unit 145 (S21),the service data No. 1 is designated (S22), and whether or not theposition is within the region of the area No. i is judged (S23). If itis not in the region, the subsequent service data is designated oneafter another, and thus service data within the region of the area No. iis searched with regard to all the service data (S24 to S27). In theregion, a display character is selected from the service type of servicedata No. 1 (S28), and the display position is designated and a displaycharacter is output (S29). Next, whether or not there is a request ofadditional data is judged (S30). If there is such a request, theadditional data is output (S31), whereas if there is not, the state ismaintained as it is, and it is judged whether or not there has been achange in area (S32).

Here, if there has been no change in area, the operation moves back toStep S24, where the next service data is designated and theabove-described process is repeated. If there has been a change in area,the operation moves back to step S21 to execute the process from thebeginning.

In the above-described manner, area map data selected by the areaselecting unit 147 and area service data (display character andadditional data) selected by the area service data selecting unit 146are both sent to the synthesizing unit 147. FIG. 31 shows the processingcontents of the synthesizing unit 147.

In FIG. 31, first, a map of the area No. i is drawn from the map dataselected from the area selecting unit 147 (S41), and a display characteris superimposed at a designated location on the map drawn on the basisof the service data from the area service data selecting unit 146 (S42).Here, when there is a request of reproduction of additional data fromthe user, it is judged if the additional data is present or absent(S43). If the additional data is present, it is reproduced and output(S44), whereas if it is absent, a series of processing operations arefinished.

FIG. 32A shows a display example of service data formed by thesynthesizing unit 147. In this example, texts which indicate facilitiessuch as stores and public facilities, and their titles are displayed asthey are superimposed on a road map. This figures shows that, when theuser operates to select one of them by a touch panel, texts given asadditional data are displayed by a pop up form.

There are several ways of presenting additional data considered. Forexample, if they are of text data, they can be read out in voice, andthen the driver is no longer required to watch the screen, which ispreferable in terms of safety. Or not in a pop up form, but the data maybe displayed on the entire screen or in a telop form. Further, if theadditional data is in image, sub-screen display, divisional display,screen switching display and the like are considered.

Here, it is preferable that the additional data should be in compliancewith the format of MPEG 4. With this format, it becomes possible to freeset the data to be synthesized with other objects.

Further, when an access address to the response server 310 is written inadditional data, and its access guide is included in the additional dataas provided service data, it is presented to the user in the form ofimage or sound. Here, when a selection operation is received through thetouch panel, the mobile communication device 158 is automaticallyconnected to the response server 310 via the mobile communicationcontrol device 151, and a necessary download operation (for example,area information) or upload operation (for example, answer toquestionnaire or quiz, a request or the like) is executed. Thus, it ispossible to integrate the invention with the mobile communication.

Next, the integration of the invention with other broadcast orcommunication media will now be described.

First, the integration with the ITS system will now be considered. Thatis, in FIG. 24, when there is ITS data received from the ITS signalreceiver 155, the amount of traffic and the like are identified from theITS data in the area service data selecting unit 146 or the synthesizingunit 147. Such data may be displayed on the display unit 148 as, displayportions, for example, the range of a traffic jam, a site of road underconstruction, and a site of an accident which occurred, are superimposedon the map drawn, or the side of road under construction, the distanceto the site of the accident occurred, and the guide to the detour arepresented in sounds. As an example, FIG. 33B shows an display image inwhich a display part which indicates a traffic jam section formed fromthe ITS data is superimposed on a map formed of data from the areaselecting unit 145.

Here, a specific example of the integration with the ITS system will bedescribed.

Recently, in Japan, VICS (vehicle information and communication system)service started as one of the ITS systems. This service uses acommunication line of, for example, an FM data multiplex broadcast totransmit traffic jam data to a car navigation device. The traffic jamdata transmitted via the VICS include link jam data and link traveldata. A link is a unit of a road partitioned by main intersections. Thelink jam data provides the traffic jam status of each link bycategorizing it into four steps, namely “jam-up”, “heavy”, “light” and“no information available”. The link travel time is a time required topass through a link.

In the above-described car navigation device, the roads of the built-inmap database are associated with the links in advance so that it becomesable to separate the road by different colors, and perform a dynamicroute navigation and the like. It should be noted that the state wherethe roads on the map need be separated by different colors is called aVICS level 3. In level 1, only text data is indicated, and in level 2,simplified vector graphic display is indicated; therefore it is notnecessary to consider the location of the link on the display screen(naturally, location data of a link is necessary for navigation anddynamic route search).

This link itself is not very frequently revised for its nature; howeverfor the in-advance preparation of the area enlargement to be subjectedto VICS, it is considered advantageous to provide link adding means. Thedata regarding link (which road, the name of the intersection of thestarting point or finishing point, absolute coordinates of these, andthe like) are not transmitted via VICS, and therefore it is necessarythat they should be stored in CD-ROM in advance (car navigation mode),or such data are stored in the terminal side via data distribution suchas broadcasting.

With the present invention, when broadcasting map data, latest link dataitself which has been subjected to revision, addition and deletion arebroadcasted, and link data is accumulated in the terminal device side tomake a database.

An example of link data is shown in FIG. 33. In each link number of thelink data, the name of the intersections of the starting point andfinishing point, and their coordinates are indicated. In the case whereVICS data is newly obtained, it is checked if the traffic status is“jam-up”, if it is not “jamup”, the process is finished. On the otherhand, if it is “jam-up”, coordinates 1 of the intersection at thestarting point and coordinates 2 of the intersection at the finishingpoint are obtained from the link number of VICS data and link database.Then, it is judged if each set of them is included in an area 1presently displayed, and if none of them are included, the process isfinished. If included, a text which indicates “jam-up” is displayed atthe location of the coordinates.

It should be noted that when a link database is provided in advance inthe terminal device, and only data regarding revision, addition ordeletion to the link data on the database is broadcasted, to renew thedatabase of the terminal device one after another, it is possible tosave the time for accumulating the link data for the first time.

It is also possible that, in the VICS, only text data of level 1 isobtained, and it is displayed on the receiver's screen of the originaldigital broadcasting in a telop mode.

Next, the integration with the ground wave TV broadcast is considered.As data utilized in the conventional broadcast, text data in charactermultiplexion broadcast or text data are considered. In this case, acharacter multiplex broadcast is received by a ground wave TV receiver157 and the text data is developed by the area service data selectingunit 146 or synthesizing unit 147 in a predetermined region on thescreen to be displayed in a telop mode on the display unit 148. Anexample is shown in FIG. 32C, which illustrates that text data obtainedby a TV receiver 155 is superimposed and displayed in a telop mode on amap formed by data from the area selecting unit 145.

Further, in the case where regional data such as weather forecast isreceived by character multiplex broadcast, it is more advantageous thatsuch data is interpreted and displayed in text on the map. Further, asthe digital broadcast is being improved as advanced TV broadcast. Underthese circumstances, when a program is provided in compliance with theMPEG 4, the contents of the program can be freely and easily taken in.

(Other Embodiment)

The structures of the first to third embodiments and those of the fourthto sixth embodiments may be incorporated in appropriate combinations inaccordance with necessity to make other embodiments.

Further, the above-described embodiments are described in connectionwith the case of a digital satellite broadcast system; however thepresent invention is applicable to a digital broadcast system which usesa ground wave.

Further, in any of the first to sixth embodiments, objects are decodedby the decoders 44 to 46, and then selected by the selecting unit 49 inaccordance with the scene description data. Further, they areselectively synthesized by the synthesizing unit 50. However, it is alsopossible that objects are selected by the selection unit 49 on the basisof the scene description data, and then thus selected objects aredecoded to be synthesized.

Further, in the seventh embodiment, the integration with TV broadcast isexplained, but naturally the integration with the radio broadcast issimilarly practicable. Further, it is possible that when a high-fidelitytelevision broadcast in other satellite broadcast is broadcasted at lowrate, the high-fidelity television broadcast is received and displayedwhile standing or traveling at low speed. On the other hand, whiletraveling at high speed, a broadcast from the main satellite broadcastsystem can be received and displayed. Further, when a mobilecommunication device is utilized, it becomes possible to watch a TVprogram distributed via the Internet or the like.

Further, the seventh embodiment is described in connection with the casewhere the touch panel is used by the user to make a selection. Forinputting an instruction of selection, a voice recognition device,remote controller and the like can be utilized. In particular, in thecase where the voice recognition device is used, the user can set aninstruction without changing the eye view while driving, which ispreferable in terms of safety.

In the seventh embodiment, map data is provided all in broadcasting; butit is also possible that renewal data is provided for the map dataalready set in the conventional car navigation system.

Further, it is also considered that still image and text data areprovided in cooperation with a radio broadcast, or program data isprovided in cooperation with a television broadcast.

Moreover, as the encoding method employed in a digital satellitebroadcast system for mobile station s, there is a plan of using anMPEG4; however the present invention is not limited to this, but, forexample, MHEG (Multimedia and Hypermedia Expert Group) and the like canbe used. The format of indicating scene description data may be of anytype of it's own, and various formats such as HTML (Hyper Text MarkupLanguage) and XML (eXtensible Markup Language: one of metalanguges fordescribing data structurally).

INDUSTRIAL APPLICABILTY

As described above in detail, according to the present invention, thereis provided a digital broadcasting system which not only merely providesa program as a broadcast service when broadcasting multimedia datacontaining picture, sound, texts and the like, to a terminal devicebuilt in, mainly, a mobile station, but also is capable of presentingdata which can flexibly follow up the needs and the use state of theuser with the program contents themselves, as well as a terminal devicetherefor.

As a result, there is provided a digital broadcasting system capable ofpresenting data optimal to the status of the terminal device, togetherwith a terminal device. Further, there is provided a digitalbroadcasting system for providing a broadcasting service from a newpoint of view, and capable of contributing to the development of theinformation society, by integrating a plurality of broadcasting servicestogether and further integrating a new service with a conventionalmedium.

What is claimed is:
 1. A terminal device used in a digital broadcastsystem for multiplexing one or more objects along with scene descriptiondata to obtain a multiplex signal, and converting the multiplex signalinto a broadcast signal in a broadcast station, so as to be broadcastedtowards a predetermined service area, said one or more objectscomprising scenes of a program provided, the scene description datacontaining data for selectively synthesizing said one or more objectsand providing each of said one or more scenes, said terminal devicecomprising: receiver means for receiving the broadcast signal andreproducing said one or more objects and the scene description data fromthe received signal; status detection means for detecting apredetermined status of a self device; and a data base in which set dataeach indicating a relationship in terms of correspondence between thestatus of the self device and an object to be presented to the user arestored; object selecting means for selecting objects to be presentedfrom said one or more objects reproduced by the receiver means, on thebasis of a detection result by the status detection means, the set dataof the data base and the scene description data; and a presentationdevice for presenting the objects selected by the selecting means.
 2. Aterminal device used in a digital broadcast system for multiplexing oneor more objects along with scene description data to obtain a multiplexsignal, and converting the multiplex signal into a broadcast signal in abroadcast station, so as to be broadcasted towards a predeterminedservice area on a ground by relaying the broadcast signal via asatellite, said one or more objects comprising scenes of a programprovided, the scene description data containing data for selectivelysynthesizing said one or more objects and providing each of said one ormore scenes, the terminal device comprising: receiver means forreceiving the broadcast signal and reproducing the one or more objectsand the scene description data from the received signal; statusdetection means for detecting a predetermined status of a self device;database in which setting data each indicating a relationship in termsof correspondence between the status of the self device and an object tobe presented to the user are stored; object selecting means forselecting objects to be presented from said one or more objectsreproduced by the receiver means, on the basis of a detection result bythe status detection means, the setting data of the database and thescene description data; and a presentation device for presenting theobjects selected by the selecting means.
 3. A terminal device used in adigital broadcast system according to claim 1 or 2, wherein: the statusdetection means includes location detection means for detecting apresent location of the self device; the database stores the settingdata each indicating a relationship in terms of correspondence betweenthe status of the self device and an object to be presented to the user;and the object selecting means selects an object corresponding to thepresent location of the self device from the one or more objectsreproduced by the receiver means, on the basis of the present locationof the self device, detected by the location detection means and thesetting data of the database.
 4. A terminal device used in a digitalbroadcast system according to claim 1 or 2, wherein: the statusdetection means includes moving state detection means for detecting amoving state of the self device; the database stores, in advance, thesetting data each indicating a relationship in terms of correspondencebetween the moving state of the self device and an object to bepresented to the user; and the object selecting means selects an objectcorresponding to the moving state of the self device from the one ormore objects reproduced by the receiver means, on the basis of themoving state of the self device, detected by the moving state detectionmeans and the setting data of the database.
 5. A terminal device used ina digital broadcast system according to claim 1 or 2, wherein: thestatus detection means includes presentation type detection means fordetecting a type of the presentation device; the database stores, inadvance, the setting data each indicating a relationship in terms ofcorrespondence between the type of the presentation device and an objectto be presented to the user; and the object selecting means selects anobject corresponding to the type of the presentation device from the oneor more objects reproduced by the receiver means, on the basis of thetype of the presentation device, detected by the presentation typedetection means and the setting data of the database.
 6. A terminaldevice used in a digital broadcast system according to claim 1 or 2,wherein: when the broadcast station inputs renewal data for renewingsetting data stored in the database, in the broadcast signal, thereceiver means reproduces the renewal data from the received signal; andthe terminal device further comprises renewal control means for renewingsetting data stored in the database in accordance with the renewal datareproduced by the receiver means.
 7. A digital broadcasting system inwhich one or more objects which constitute scenes of a provided program,and scene description data containing data used for synthesizing andpresenting these objects, are converted into broadcast signals in abroadcast station, and the broadcast signals are transmitted to aterminal device, wherein: the broadcast station comprises conditiondesignation data transmitting means for transmitting the broadcastsignal with condition designation data for designating presentationcondition of the objects, contained therein; and the terminal deviceincludes: receiver means for receiving the broadcast signal andreproducing one or more objects, scene description data and conditiondesignation data, respectively, from the received signal; statusdetection means for detecting a predetermined status of the self device;object selection means for selecting an object to be presented, from theone or more objects reproduced by the receiver means; and a presentationdevice for presenting the object selected by the selection means on thebasis of the scene description data reproduced by the receiver means. 8.A digital broadcasting system in which one or more objects whichconstitute scenes of a provided program, and scene description datacontaining data used for synthesizing and presenting these objects, areconverted into broadcast signals in a broadcast station, and thebroadcast signals are transmitted to a terminal device present in apredetermined service area on a ground by relaying the broadcast signalsvia a satellite, wherein: the broadcast station comprises conditiondesignation data transmitting means for transmitting the broadcastsignal with condition designation data for designating presentationcondition of the objects, contained therein; and the terminal deviceincludes: receiver means for receiving the broadcast signal andreproducing one or more objects, scene description data and conditiondesignation data, respectively, from the received signal; statusdetection means for detecting a predetermined status of the self device;object selection means for selecting an object to be presented, from theone or more objects reproduced by the receiver means; and a presentationdevice for presenting the object selected by the selection means on thebasis of the scene description data reproduced by the receiver means. 9.A digital broadcast system according to claim 7 or 8, wherein thecondition designation data transmitting means transmits the scenedescription data with condition designation data for designatingpresentation condition of the objects, contained therein.
 10. A digitalbroadcast system according to claim 7 or 8, wherein: the conditiondesignation data transmission means transmits region designation datafor designating a presentation region for each object constituting ascene as one of the condition designation data; the status detectionmeans includes location detection means for detecting a present locationof the self device; and the object selection means compares the presentlocation of the self device detected by the location detection means andthe region designation data reproduced by the receiver means, with eachother, and selects an object corresponding to the present location ofthe self device on the basis of a result of the comparison.
 11. Adigital broadcast system according to claim 7 or 8, wherein: thecondition designation data transmission means transmits movement statetype designation data for performing presentation in accordance with themoving state of the terminal device for each object constituting a sceneas one of the condition designation data; the receiver means reproducesmovement state type designation data which is one of the conditiondesignation data from the receiver signal; the status detection meansincludes movement state detection means for detecting a movement stateof the self device; and the object selection means compares the movementstate of the self device detected by the movement state detection meansand the movement state type designation data reproduced by the receivermeans, with each other, and selects an object corresponding to themovement state of the self device on the basis of a result of thecomparison.
 12. A digital broadcast system according to claim 7 or 8,wherein: the condition designation data transmission means transmitstype designation data for designating a type of a presentation devicecapable of presentation for each object constituting a scene as one ofthe condition designation data; the receiver means reproducespresentation type designation data which is one of the conditiondesignation data from the receiver signal; the status detection meansincludes presentation type detection means for detecting the type of thepresentation device; and the object selection means compares the type ofthe presentation device detected by the presentation type detectionmeans and the type designation data reproduced by the receiver means,with each other, and selects and transmits an object corresponding tothe designated type of the presentation device on the basis of a resultof the comparison.
 13. A terminal device used in a digital broadcastingsystem in which one or more objects which constitute scenes of aprovided program, scene description data containing data used forsynthesizing and presenting these objects, and condition designationdata for designating a presentation condition of the objects, areconverted into broadcast signals in a broadcast station, to betransmitted towards a predetermined service area, the terminal devicecomprising: receiver means for receiving the broadcast signal andreproducing one or more objects, scene description data and conditiondesignation data, respectively, from the received signal; statusdetection means for detecting a predetermined status of the self device;object selection means for selecting an object to be presented, from theone or more objects reproduced by the receiver means, on the basis of aresult of the detection by the status detection means and the conditiondesignation data reproduced by the receiver means; and a presentationdevice for presenting the object selected by the selection means.
 14. Aterminal device used in a digital broadcasting system in which one ormore objects which constitute scenes of a provided program, scenedescription data containing data used for synthesizing and presentingthese objects, and condition designation data for designating apresentation condition of the objects, are converted into broadcastsignals in a broadcast station, and the broadcast signals arebroadcasted towards a predetermined service area on a ground by relayingthem via a satellite, the terminal device comprising: receiver means forreceiving the broadcast signal and reproducing one or more objects,scene description data and condition designation data from the receivedsignal; status detection means for detecting a predetermined status ofthe self device; object selection means for selecting an object to bepresented, from the one or more objects reproduced by the receivermeans, on the basis of a result of the detection by the status detectionmeans and the condition designation data reproduced by the receivermeans; and a presentation device for presenting the object selected bythe selection means.
 15. A terminal device used in a digital broadcastsystem according to claim 13 or 14, wherein: when the broadcast stationtransmits the broadcast signal with region designation data fordesignating a presentation region for each object constituting a scene,as one of the condition designation data, the receiver means reproducesregion designation data, which is one of the condition designation datafrom the received signal; the status detection data includes locationdetection means for detecting a present location of a self device; andthe object selection means compares the present location of the selfdevice detected by the location detection means and the regiondesignation data reproduced by the receiver means, with each other, andselects an object corresponding to the present location of the selfdevice on the basis of a result of the comparison.
 16. A terminal deviceused in a digital broadcast system according to claim 13 or 14, wherein:when the broadcast station transmits the movement state type designationdata for performing a presentation in accordance with the movementstatus of the terminal device, for each object constituting a scene, asone of the condition designation data, the receiver means reproducesmovement state type designation data which is one of the conditiondesignation data from the receiver signal; the status detection meansincludes movement state detection means for detecting a movement stateof the self device; and the object selection means compares the movementstate of the self device detected by the movement state detection meansand the movement state type designation data reproduced by the receivermeans, with each other, and selects an object corresponding to themovement state of the self device on the basis of a result of thecomparison.
 17. A terminal device used in a digital broadcast systemaccording to claim 13 or 14, wherein: when the broadcast stationtransmits the presentation type designation data for designating thetype of the presentation device for each object constituting a scene, asone of the condition designation data, the receiver means reproducespresentation type designation data which is one of the conditiondesignation data from the receiver signal; the status detection meansincludes presentation type detection means for detecting the type of thepresentation device; and the object selection means compares the type ofthe presentation device detected by the presentation type detectionmeans and the type designation data reproduced by the receiver means,with each other, and selects and transmits an object corresponding tothe designated type of the presentation device on the basis of a resultof the comparison.
 18. A terminal device used for the digitalbroadcasting system, which provides a broadcast service containing atleast one of picture, sound and data, the terminal comprising: abroadcast receiver unit for receiving a plurality of broadcast servicesrelated to each other between arbitrary channels, of broadcast signalsof the plurality of channels; data synthesizing means for synthesizingdata of a plurality of broadcast services related to each other,received by the broadcast receiver, to present it as one broadcastservice; and a display device and sound reproduction device fordisplaying image and sound of a broadcast service presented by the datasynthesizing means, wherein the broadcast services related between thearbitrary channels are broadcast service for providing map data, andbroadcast service for providing data of facilities and region, whichinclude location data on the map, the broadcast service which providesthe map data fractionize a map of an entire broadcast area, withaddition of location data to each part, and the terminal device includespresent location data acquiring means for acquiring a present locationof a self, the data synthesizing means comprising: area identificationmeans for identifying a divided area on the map, obtained from presentlocation data acquired by the present location data acquiring means;data selection means for selecting a facility or region data, which isincluded in the area identified by the area identification means, fromdata provided by the facility or region data broadcast service; andimage synthesizing means for developing the map identified by the areaidentification means and synthesizing the facility or region dataselected by the data selection means on the map in a predeterminedformat, and wherein when traffic control data receiver means isequipped, the data synthesizing means synthesizes contents of trafficcontrol data obtained by the traffic control data receiver means, on themap in a predetermined format.
 19. A terminal device used for thedigital broadcasting system, which provides a broadcast servicecontaining at least one of picture, sound and data, the terminalcomprising: a broadcast receiver unit for receiving a plurality ofbroadcast services related to each other between arbitrary channels, ofbroadcast signals of the plurality of channels; data synthesizing meansfor synthesizing data of a plurality of broadcast services related toeach other, received by the broadcast receiver, to present it as onebroadcast service; and a display device and sound reproduction devicefor displaying image and sound of a broadcast service presented by thedata synthesizing means, wherein the broadcast services related betweenthe arbitrary channels are broadcast service for providing map data, andbroadcast service for providing data of facilities and region, whichinclude location data on the map, the broadcast service which providesthe map data fractionize a map of an entire broadcast area, withaddition of location data to each part, and the terminal device includespresent location data acquiring means for acquiring a present locationof a self, the data synthesizing means comprising: area identificationmeans for identifying a divided area on the map, obtained from presentlocation data acquired by the present location data acquiring means;data selection means for selecting a facility or region data, which isincluded in the area identified by the area identification means, fromdata provided by the facility or region data broadcast service; andimage synthesizing means for developing the map identified by the areaidentification means and synthesizing the facility or region dataselected by the data selection means on the map in a predeterminedformat, and wherein when ground wave broadcast receiver means isequipped, the image synthesizing means takes in data of a ground wavebroadcast program designated by the user, obtained by the ground wavebroadcast receiver means, and synthesize images in a predeterminedformat.
 20. A terminal device used for the digital broadcasting system,which provides a broadcast service containing at least one of picture,sound and data, the terminal comprising: a broadcast receiver unit forreceiving a plurality of broadcast services related to each otherbetween arbitrary channels, of broadcast signals of the plurality ofchannels; data synthesizing means for synthesizing data of a pluralityof broadcast services related to each other, received by the broadcastreceiver, to present it as one broadcast service; and a display deviceand sound reproduction device for displaying image and sound of abroadcast service presented by the data synthesizing means, wherein whenthere is a server who provides data relating to this digital broadcastvia a public communication network, and acquires data from the user, anaccess guide is provided to the server in the broadcast service, andcommunication means with the public communication network is provided,the data synthesizing means includes server access guide presentationmeans for presenting the server access guide to the user via the displaydevice or audio reproduction device, and the terminal device furthercomprises server connection instruction detection means for detecting aserver connection instruction of the user by presenting the serveraccess guide, and communication control means for automaticallyconnecting the communication means to the server when the serverconnection instruction is detected by the detection means, and executingcommunication on the basis of contents of the server access guide.
 21. Aterminal device of a digital broadcast system according to claim 20,further comprising: an input device for inputting a user selectioninstruction to the server connection instruction detection means.
 22. Aterminal device of a digital broadcast system according to claim 21,wherein the input device is either one of a remote controller for thereceiver device, a touch panel device provided on the display screen ofthe display device and a voice recognition device for recognizing aninput voice of the user.